Unit Commitment for the New Power System Considering the Uncertain Generation and Consumption

New power system characterized by the high penetrations of wind and solar generation as well as the modern load are facing the high uncertainty existing in electricity generation and consumption. In response to this challenge, this paper incorporates fuzzy chance constraints (FCC) and more detailed energy storage constraints into the traditional unit commitment (UC) model, creating a more realistic model. Firstly, credibility theory is employed to introduce FCC for the fuzzification of generation and consumption, and the trapezoidal fuzzy parameter equivalence method is used to numerically equate the forecasted outputs of generation and consumption. Secondly, the enhanced UC model is established by combining conventional thermal power units and energy storage unit constraints. Finally, a case study is conducted utilizing forecast data sourced from a specific location in Northwest China to substantiate the efficacy of the proposed UC model in comprehensively accounting for diverse energy resources. The analysis confirms that the system's confidence level significantly influences economic performance and reserve capacity, moreover, accounting for uncertainties in generation and consumption can improve the system's resilience to disturbances.